package com.ruoyi.framework.config;

import com.ruoyi.framework.config.properties.CasProperties;
import com.ruoyi.framework.security.handle.CasAuthenticationSuccessHandler;
import com.ruoyi.framework.web.service.CasUserDetailsService;
import org.jasig.cas.client.session.SingleSignOutFilter;
import org.jasig.cas.client.validation.Cas20ServiceTicketValidator;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.http.HttpMethod;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.cas.ServiceProperties;
import org.springframework.security.cas.authentication.CasAuthenticationProvider;
import org.springframework.security.cas.web.CasAuthenticationEntryPoint;
import org.springframework.security.cas.web.CasAuthenticationFilter;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.authentication.logout.LogoutFilter;
import org.springframework.security.web.authentication.logout.SecurityContextLogoutHandler;
import org.springframework.web.filter.CorsFilter;
import com.ruoyi.framework.security.filter.JwtAuthenticationTokenFilter;
import com.ruoyi.framework.security.handle.AuthenticationEntryPointImpl;
import com.ruoyi.framework.security.handle.LogoutSuccessHandlerImpl;

/**
 * spring security配置
 *
 * @author ruoyi
 */
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {
  @Autowired
  private CasProperties casProperties;

  @Autowired
  private CasUserDetailsService customUserDetailsService;

  @Autowired
  private CasAuthenticationSuccessHandler casAuthenticationSuccessHandler;

  /**
   * 自定义用户认证逻辑
   */
  @Autowired
  private UserDetailsService userDetailsService;

  /**
   * 认证失败处理类
   */
  @Autowired
  private AuthenticationEntryPointImpl unauthorizedHandler;

  /**
   * 退出处理类
   */
  @Autowired
  private LogoutSuccessHandlerImpl logoutSuccessHandler;

  /**
   * token认证过滤器
   */
  @Autowired
  private JwtAuthenticationTokenFilter authenticationTokenFilter;

  /**
   * 跨域过滤器
   */
  @Autowired
  private CorsFilter corsFilter;


  /**
   * 解决 无法直接注入 AuthenticationManager
   *
   * @return
   * @throws Exception
   */
  @Bean
  @Override
  public AuthenticationManager authenticationManagerBean() throws Exception {
    return super.authenticationManagerBean();
  }

  /**
   * anyRequest          |   匹配所有请求路径
   * access              |   SpringEl表达式结果为true时可以访问
   * anonymous           |   匿名可以访问
   * denyAll             |   用户不能访问
   * fullyAuthenticated  |   用户完全认证可以访问（非remember-me下自动登录）
   * hasAnyAuthority     |   如果有参数，参数表示权限，则其中任何一个权限可以访问
   * hasAnyRole          |   如果有参数，参数表示角色，则其中任何一个角色可以访问
   * hasAuthority        |   如果有参数，参数表示权限，则其权限可以访问
   * hasIpAddress        |   如果有参数，参数表示IP地址，如果用户IP和参数匹配，则可以访问
   * hasRole             |   如果有参数，参数表示角色，则其角色可以访问
   * permitAll           |   用户可以任意访问
   * rememberMe          |   允许通过remember-me登录的用户访问
   * authenticated       |   用户登录后可访问
   */
  @Override
  protected void configure(HttpSecurity httpSecurity) throws Exception {

    if (!casProperties.isCasEnable()) {
      httpSecurity
              // CSRF禁用，因为不使用session
              .csrf().disable()
              // 认证失败处理类
              .exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()
              // 基于token，所以不需要session
              .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
              // 过滤请求
              .authorizeRequests()
              // 对于登录login 注册register 验证码captchaImage 允许匿名访问
              .antMatchers("/login", "/register", "/captchaImage").anonymous()
              .antMatchers(
                      HttpMethod.GET,
                      "/",
                      "/*.html",
                      "/**/*.html",
                      "/**/*.css",
                      "/**/*.js",
                      "/profile/**"
              ).permitAll()
              .antMatchers("/common/download**").anonymous()
              .antMatchers("/common/download/resource**").anonymous()
              .antMatchers("/swagger-ui.html").anonymous()
              .antMatchers("/swagger-resources/**").anonymous()
              .antMatchers("/webjars/**").anonymous()
              .antMatchers("/*/api-docs").anonymous()
              .antMatchers("/druid/**").anonymous()
              .antMatchers("/websocket/**").anonymous()
              .antMatchers("/magic/web/**").anonymous()
              // 除上面外的所有请求全部需要鉴权认证
              .anyRequest().authenticated()
              .and()
              .headers().frameOptions().disable();
      httpSecurity.logout().logoutUrl("/logout").logoutSuccessHandler(logoutSuccessHandler);
      // 添加JWT filter
      httpSecurity.addFilterBefore(authenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
      // 添加CORS filter
      httpSecurity.addFilterBefore(corsFilter, JwtAuthenticationTokenFilter.class);
      httpSecurity.addFilterBefore(corsFilter, LogoutFilter.class);
    }

    //开启cas
    if (casProperties.isCasEnable()) {
      httpSecurity
              // CSRF禁用，因为不使用session
              .csrf().disable()
              // 基于token，所以不需要session
              .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
              // 过滤请求
              .authorizeRequests()
              // 对于登录login 验证码captchaImage 允许匿名访问
              //.antMatchers("/login", "/captchaImage").anonymous()
              .antMatchers(
                      HttpMethod.GET,
                      "/*.html",
                      "/**/*.html",
                      "/**/*.css",
                      "/**/*.js"
              ).permitAll()
              .antMatchers("/profile/**").anonymous()
              .antMatchers("/common/download**").anonymous()
              .antMatchers("/common/download/resource**").anonymous()
              .antMatchers("/swagger-ui.html").anonymous()
              .antMatchers("/swagger-resources/**").anonymous()
              .antMatchers("/webjars/**").anonymous()
              .antMatchers("/*/api-docs").anonymous()
              .antMatchers("/druid/**").anonymous()
              .antMatchers("/websocket/**").anonymous()
              .antMatchers("/magic/web/**").anonymous()
              // 除上面外的所有请求全部需要鉴权认证
              .anyRequest().authenticated()
              .and()
              .headers().frameOptions().disable();
      //单点登录登出
      httpSecurity.logout().permitAll().logoutSuccessHandler(logoutSuccessHandler);
      // Custom JWT based security filter
      httpSecurity.addFilter(casAuthenticationFilter())
              .addFilterBefore(authenticationTokenFilter, CasAuthenticationFilter.class)
              //.addFilterBefore(casLogoutFilter(), LogoutFilter.class)
              .addFilterBefore(singleSignOutFilter(), CasAuthenticationFilter.class).exceptionHandling()
              //认证失败
              .authenticationEntryPoint(casAuthenticationEntryPoint());

      // 添加CORS filter
      httpSecurity.addFilterBefore(corsFilter, JwtAuthenticationTokenFilter.class);
      httpSecurity.addFilterBefore(corsFilter, LogoutFilter.class);
      // disable page caching
      httpSecurity.headers().cacheControl();
    }
  }

  /**
   * 强散列哈希加密实现
   */
  @Bean
  public BCryptPasswordEncoder bCryptPasswordEncoder() {
    return new BCryptPasswordEncoder();
  }

  /**
   * 身份认证接口
   */
  @Override
  protected void configure(AuthenticationManagerBuilder auth) throws Exception {
    if (!casProperties.isCasEnable()) {
      auth.userDetailsService(userDetailsService).passwordEncoder(bCryptPasswordEncoder());
    }
    // cas
    if (casProperties.isCasEnable()) {
      super.configure(auth);
      auth.authenticationProvider(casAuthenticationProvider());
    }
  }


  /**
   * 认证的入口
   */
  @Bean
  public CasAuthenticationEntryPoint casAuthenticationEntryPoint() {
    CasAuthenticationEntryPoint casAuthenticationEntryPoint = new CasAuthenticationEntryPoint();
    casAuthenticationEntryPoint.setLoginUrl(casProperties.getCasServerLoginUrl());
    casAuthenticationEntryPoint.setServiceProperties(serviceProperties());
    return casAuthenticationEntryPoint;
  }

  /**
   * 指定service相关信息
   */
  @Bean
  public ServiceProperties serviceProperties() {
    ServiceProperties serviceProperties = new ServiceProperties();
    serviceProperties.setService(casProperties.getAppServerUrl() + casProperties.getAppLoginUrl());
    serviceProperties.setAuthenticateAllArtifacts(true);
    return serviceProperties;
  }

  /**
   * CAS认证过滤器
   */
  @Bean
  public CasAuthenticationFilter casAuthenticationFilter() throws Exception {
    CasAuthenticationFilter casAuthenticationFilter = new CasAuthenticationFilter();
    casAuthenticationFilter.setAuthenticationManager(authenticationManager());
    casAuthenticationFilter.setFilterProcessesUrl(casProperties.getAppLoginUrl());
    casAuthenticationFilter.setAuthenticationSuccessHandler(casAuthenticationSuccessHandler);
    return casAuthenticationFilter;
  }

  /**
   * cas 认证 Provider
   */
  @Bean
  public CasAuthenticationProvider casAuthenticationProvider() {
    CasAuthenticationProvider casAuthenticationProvider = new CasAuthenticationProvider();
    casAuthenticationProvider.setAuthenticationUserDetailsService(customUserDetailsService);
    casAuthenticationProvider.setServiceProperties(serviceProperties());
    casAuthenticationProvider.setTicketValidator(cas20ServiceTicketValidator());
    casAuthenticationProvider.setKey("casAuthenticationProviderKey");
    return casAuthenticationProvider;
  }

  @Bean
  public Cas20ServiceTicketValidator cas20ServiceTicketValidator() {
    return new Cas20ServiceTicketValidator(casProperties.getCasServerUrl());
  }

  /**
   * 单点登出过滤器
   */
  @Bean
  public SingleSignOutFilter singleSignOutFilter() {
    SingleSignOutFilter singleSignOutFilter = new SingleSignOutFilter();
    singleSignOutFilter.setCasServerUrlPrefix(casProperties.getCasServerUrl());
    singleSignOutFilter.setIgnoreInitConfiguration(true);
    return singleSignOutFilter;
  }

  /**
   * 请求单点退出过滤器
   */
  @Bean
  public LogoutFilter casLogoutFilter() {
    LogoutFilter logoutFilter = new LogoutFilter(casProperties.getCasServerLogoutUrl(),
            new SecurityContextLogoutHandler());
    logoutFilter.setFilterProcessesUrl(casProperties.getAppLogoutUrl());
    return logoutFilter;
  }
}
